Bring stock to boil, add soaked beans; simmer until beans are almost tender. Add basil, garlic and spaghetti sauce. Simmer for 15 minutes. Add carrots, celery, onion, zucchini and meat. Simmer until vegetables are almost tender, stirring constantly. Add potato and pasta, stirring until both are cooked. Add tomatoes, simmer until cooked and season soup with salt and pepper to taste. Before serving, stir in spinach and cook briefly.

Serves 15.